void sam_boardinitialize(void)
{
/* Configure SPI chip selects if 1) SPI is enable, and 2) the weak function
* sam_spiinitialize() has been brought into the link.
*/
#if defined(CONFIG_SAMA5_SPI0) || defined(CONFIG_SAMA5_SPI1)
if (sam_spiinitialize)
{
sam_spiinitialize();
}
#endif
#if defined(CONFIG_SAMA5_DDRCS) && !defined(CONFIG_SAMA5_BOOT_SDRAM)
/* Configure SDRAM if (1) SDRAM has been enalbled in the NuttX configuration and
* (2) if we are not currently running out of SDRAM. If we are now running out
* of SDRAM then we have to assume that some second level bootloader has properly
* configured SDRAM for our use.
*/
sam_sdram_config();
#endif
/* Initialize USB if the 1) the HS host or device controller is in the
* configuration and 2) the weak function sam_usbinitialize() has been brought
* into the build. Presumeably either CONFIG_USBDEV or CONFIG_USBHOST is also
* selected.
*/
#if defined(CONFIG_SAMA5_UHPHS) || defined(CONFIG_SAMA5_UDPHS)
if (sam_usbinitialize)
{
sam_usbinitialize();
}
#endif
/* Configure board resources to support networkingif the 1) networking is enabled,
* 2) the EMAC or GMAC module is enabled, and 2) the weak function
* sam_netinitialize() has been brought into the build.
*/
#ifdef HAVE_NETWORK
if (sam_netinitialize)
{
sam_netinitialize();
}
#endif
#ifdef CONFIG_ARCH_LEDS
/* Configure on-board LEDs if LED support has been selected. */
board_led_initialize();
#endif
}
void sam_boardinitialize(void)
{
#ifdef CONFIG_SCHED_TICKLESS
uint32_t frequency;
uint32_t actual;
/* If Tickless mode is selected then enabled PCK6 as a possible clock
* source for the timer/counters. The ideal frequency could be:
*
* frequency = 1,000,000 / CONFIG_USEC_PER_TICK
*
* The main crystal is selected as the frequency source. The maximum
* prescaler value is 256 so the minimum frequency is 46,875 Hz which
* corresponds to a period of 21.3 microseconds. A value of
* CONFIG_USEC_PER_TICK=20, or 50KHz, would give an exact solution with
* a divider of 240.
*/
frequency = USEC_PER_SEC / CONFIG_USEC_PER_TICK;
DEBUGASSERT(frequency >= (BOARD_MAINOSC_FREQUENCY / 256));
actual = sam_pck_configure(PCK6, PCKSRC_MAINCK, frequency);
/* We expect to achieve this frequency exactly */
DEBUGASSERT(actual == frequency);
UNUSED(actual);
/* Enable PCK6 */
(void)sam_pck_enable(PCK6, true);
#endif
#ifdef CONFIG_SAMV7_SDRAMC
/* Configure SDRAM if it has been enabled in the NuttX configuration.
* Here we assume, of course, that we are not running out SDRAM.
*/
sam_sdram_config();
#endif
#ifdef CONFIG_SAMV7_SPI
/* Configure SPI chip selects if SPI has been enabled */
sam_spidev_initialize();
#endif
#ifdef HAVE_USB
/* Setup USB-related GPIO pins for the SAME70-XPLD board. */
sam_usbinitialize();
#endif
#ifdef HAVE_NETWORK
/* Configure board resources to support networking if the 1) networking is
* enabled, and 2) the EMAC module is enabled
*/
sam_netinitialize();
#endif
/* Configure on-board LEDs if LED support has been selected. */
#ifdef CONFIG_ARCH_LEDS
board_autoled_initialize();
#endif
}
